GPS-derived source parameters of the 2014 North Aegean earthquake (Mw 6.9)

Authors : Asli DOĞRU, Bahadir AKTUĞ, Fatih BULUT, Haluk ÖZENER

Pages : 661-670

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :We analyzed GPS data to investigate the source parameters of the 2014 North Aegean earthquake insert ignore into journalissuearticles values(Mw 6.9);. We simultaneously inverted strike, dip, rake, average slip, moment, size, and location of the mainshock rupture using coseismic displacements. We also investigated static stress change associated with the mainshock and its influence on aftershock activity. Previous solutions of focal mechanism showed that mainshock has a nearly pure strike-slip nature. Our results also indicate that the mainshock has a right lateral strike-slip mechanism with a substantial extensional component. Average coseismic slips are 48 cm and 25 cm on the horizontal and vertical axis, respectively. Coseismic displacements reach up to 51.35 ± 4.55 mm at ~60 km from the hypocenter insert ignore into journalissuearticles values(LEMN station);. It appears that the mainshock ruptured a fault section approximately 28 km deep and 70 km long and generated a stress drop along the ruptured segment ranging between 3 and 10 bar, with a stress increase of 3 bar at the edges of the rupture. Aftershocks were distributed to a broader area as coseismic stress increase affected a 200-km-long section of the western North Anatolian Fault.
Keywords : 2014 North Aegean earthquake, GPS seismology, TUSAGA Aktif CORS TR Turkish RTK GPS network, , coseismic displacement, geodesy, stress change